Police say Allen was in one of two cars captured on surveillance video when members were fired upon in the early hours of March 11. The crowd had been gathered outside the Tyler House apartments in the 1200 block of N. Capitol Street.

The surveillance video shows two cars passing the crowd, and flashes of light as shots were fired and victims hit the ground.

The fourth suspect. 19-year-old Craig Steven Wilson, of southeast D.C., was arrested March 15. He is being held in a local jurisdiction on unrelated charges.

Most of the victims -- seven men and six women -- were shot in their extremities and suffered non life-threatening injuries. One victim was a 17-year-old; the rest were adults.